has_one_photo

Uber simple Rails plugin giving a model a single attached photo per record. When a photo is saved to the model, sized photo files are placed in the specified path, based on the indicated sizes (see below).

Note: Only JPEG images are supported at this time.

Requirements

• ImageMagick
• MiniMagick (not RMagick)

Install

script/plugin install git://github.com/seven1m/has_one_photo.git

Setup

In the model:

class Person < ActiveRecord::Base
  PHOTO_SIZES = {
    :tn => '32x32',
    :small => '75x75',
    :medium => '150x150',
    :large => '400x400'
  }
  has_one_photo :path => Rails.root + 'db/photos/people', :sizes => PHOTO_SIZES
end

In your controller(s), you need an action that calls send_photo(obj), with "obj" being an instance of the record with the photo.

There are several ways to do this, the simplest of which may be:

class PeopleController < ApplicationController
  # url looks like "/people/1/photo" and "/people/1/photo?size=small"
  def photo
    @person = Person.find params[:id]
    send_photo @person
  end
end

You'll also need a member action in your routes.rb:

map.resources :people, :member => {:photo => :get}

Prettier URLs

For an example of using a singular resource "Photo" for several resources, check out the OneBody project:

• routes.rb
• photos_controller.rb

Usage

person.photo = file_like_object # form submission, File.open, etc.
# or
person.photo = 'http://example.com/tim.jpg'

person.rotate_photo('-90') # degrees

person.has_photo?
# => true

person.photo_path
# => 'db/photos/123.jpg'

person.photo = nil # deletes the photo file(s)